CIRC 854-B

Seismic Engineering Program Report May-August 1980

Prepared on behalf of the National Science Foundation Grant CA-114

e STRONG-MOTION STATION

0 PLANNED INSTALLATION

Poplar Bl uff

MISSOURI

ARKANSAS

. NORFORK LAKE DAM

0

•

0 •

0

•

• REND LAKE DAM

• ILLINOIS

BARKLEY DAM • •

0 0

MISSISSIPPI

• GEOLOGICAL SURVEY CIRCULAR 854-B

Seismic Engineering Program Report, May-August 1980

GEOLOGICAL SURVEY CIRCULAR 854-B

Prepared on behalf of the National Science Foundation Grant CA- 114

1983

United States Department of the Interior

JAMES G. WAIT, Secretory

Geological Survey Dallas L. Peck, Director

Free on application to Branch of Distribution, U.S. Geological Survey

604 South PickeH Street, Alexandria, VA 22304

PREFACE

This Seismic Engineering Program Report is an informal p~:;;riodical primarily intended to keep the ever-growing international community of strong-motion data users apprised of the nature and availability of da~:.a recovered by the Seismic Engineering Branch of the u.s. Geological Survey (u~GS). This Strong­Motion Program is administered by the USGS and supporte.... by the National Science Foundation (Grant CA-114) in cooperation with numerous Federal, State, and local agencies and organizations. Major objectives of the program include recording both strong ground motion and the response of various types of engineered structures during potentially damaging earthqu~kes and dissemina­ting this strong-motion information and data to the earthquake engineering research and design community.

This issue contains a summary of the accelerograms rec;...vered from the USGS National Strong-Motion Network during the period May .i. through August 31, 1980. A report on the New Madrid Strong-Motion Network, a revision of strong­motion data recorded during the February 25, 1980, Horse Canyon (Anza) earthquake, and some comments about atypical accelero\:lrams recorded during recent earthquakes are included along with summaries or recent strong-motion reports, notes on the availability of digitized data, and additional general information pertinent to the USGS and to other strong-~•~otion programs. The data summary included in table 1 contains, information un those accelerograms recovered (although not necessarily recorded) during the period May-August 1980; this procedure has been adopted so that the dissemination of strong-motion information may be as expeditious and current as practicable.

Ronald l. Porcella, Editor U.S. Geological Survey, Mail Stop 78 Menlo Park, California 94025

iii

CONTENTS

Page

Preface - - - - - - iii

Recent strong-motion records - -

Atypical accelerograms recorded during recent earthquakes

Revised strong-motion data, part I - - - 7

The New Madrid Strong-Motion Network - - - 8

Summaries of recent strong-motion reports - - - - - - - - - - 14

Strong-motion information, data reports, and availability of digitized data - - - - - - - - - - - - - - - - - - - - - - 16

Data sources - - - - - - - - - - - 18

Errata - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19

TABLES

Table 1 - Summary of accelerograms, May - August ~98U - - - - - - - - 20

2 - Strong-motion aata from the Horse Canyull earthquake - - - - 4

3 - Accelerograph stations in the New Mad£ld Network - - - - 10

4 - New Madrid strong-motion data - - - - - - - - - - - - - - - - 13

ILLUSTRATIONS

Figure 1 - Comparison of accelerograms from Bonds Corner, Cerro Prieto, and Long Valley Dam - - - - - - - - - - - - - - - - - - - - - 2

2 - Location map for the New Madrid Strong-f"IOtion Network - - - - - 9

v

SEISMIC ENGINEERING PROGRAM REPORT, MAY- AUGUST 1980

RECENT STRONG-MOTION RECORDS

By R. L. Porcella and J. C. Switzer

The Mammoth Lakes, California, earthquake sequerce of May 1980 produced 153 strong-motion records from 34 USGS accelerographs located at six dams, two pumping plants, and one V.A. hospital in the San Joaquin Valley region. Most of these records are thought to be related to four magnitude 6+ earthquakes; their times of occurrerce (UTC) and local (Berkeley) magni­tudes are May 25, 16:33, 6.1; May 25, 16:49, 6.0; May 25, 19:44, 6.1; and May 27, 14:50, 6.2. Because of the large epicentral distances for the USGS stations, only four of the 153 records contain peak accelerations greater than 0.05£ (see table 1, end of report). The Cali­fornia Division of Mines and Geology, Office of Strong-motion Studies (OSMS) recorded more than one thousand data traces on accelerographs located at 14 OSMS stations in the Mammoth Lakes region during the period May 25 through May 28; approximately 350 of these traces show peak accelerations greater than 0.05 ~ (Turpen, 1980).

Thirty additional records were recovered from the USGS National Network during the period May 1 to August 31, 1980. The magnitude 6.1 northern Mexico earthquake of June 9 trig­gered nine USGS accelerographs at Imperial Valley, California, strong-motion stations; a peak acceleration of 0.13 ~ and strong duration (acceleration greater than 0.1 ~) of 1.6 seconds was recorded at the Bonds Corner station. All other USGS recordings show ground accelerations less than 0.05 ~· Additional records were recovered in northern Mexico at seven stations jointly operated by the National University of Mexico and the University of California, San Diego. Maximum ground accel­erations greater than 0.1 £ were recorded at three stations within 35 km of the epicenter; a digital accelerograph at Victoria (epicentral distance 7 km) recorded a maximum horizontal acceleration greater than 0. 8 ~ and a maximum vertical acceleration greater than 1. 0 ~' though parts of the recording could not be recovered (Anderson and others, 1982). An analog recorder at Cerro Prieto (epicentral distance 31 km) produced a maximum acceleration greater than 0.5 £ and strong shaking (greater than 0.1 ~) for about seven seconds (see the following report).

Other accelerograms recovered during this reporting period include records related to earthquakes near Mays ville, Kentucky, and Bear Valley and Livermore, California (see table 1).

Refererces: Anderson, J. G., Prince, J., Brune, J. N., and

Simons, R. S., 1982, Strong-motion accel­erograms, in Anderson, J. G., and Simons, R. s., eds~The Mexicali Valley earthquake of 9 June 1980: Earthquake EngineerinoJ Research Institute Newsletter, v. 16, no. 3, p. 79-83.

Turpen, C. D., 1980, Strong-motion records from the Mammoth Lakes earthquakes of May 1980: California Division of Mines and Geology Preliminary Report 27, 42 p.

ATYPICAL ACCELEROGRAMS RECORDED DURING RECENT EARTHQUAKES

By R. L. Porcella

The June 9, 1980, magnitude 6.1 northern Mexico earthquake triggered seven strong-motion stations in Baja California (see "Recent Strong-Motion Records," this report). One of the accelerograms, recorded at the Cerro Prie~o station, is particularly interesting because 1t contains several large-amplitude, high­frequency spikes that are remarkably similar to acceleration traces recorded at the Bonus Corner station during the October 15, 1979, Imperial Valley earthquake (Porcella and Matthiesen, 1979) and at the Long Valley Dam left abutment station during the May 1980 Mammoth Lakes earthquakes (Turpen, 1980; see figure 1). These three strong-motion statio~s are notably dissimilar in terms of geolog1c setting, epicentral distance, instrurrent housing, and local site conditions.

Bonds Corner is located approximately 15 km east of Calexico, Calif., and is situated on more than 6,000 m of Cenozoic deposits derived from the Colorado River and nearby mountain ranges. The strong-motion station is located in a one-story, agricultural equipment repair building situated on a concrete slab about 20xl5 m; the building is steel ( I-beam) frame with corrugated iron sides and roof. The near-surface material at the site consists of at least 30 m of very dense sand, with 0.5- to 2-m-thick layers of clayey silt at the surface and at depths of 9 and 12 m (R. Porcella, unpub. data, 1982).

BONDS CORNER - 10/15/79, 2316 uTc:ML:6.6

CERRO PRIETO -6/09/80, 0328 uTc:ML:6.1

~~~~-------------------T I, IJ14.J'II':-o.eag - , .. '~~w.~V\ '" 1'-V\.rJ~... ---

·-·-~ .. .A..,_..._~-. J.1~~~J .. · -·-·----~~·.:s.~-- ·- .. _.· .. ·..c...· .• ·.-~-·-·-·-·-·-·-·-·-·-.--·-.· •• -·~.· .•

LONG VALLEY DAM • 5/25/80, 1633 uTc:ML:6.1

- -------------------~--.. ~----------- -

Figure 1.- Atypical accelerograms from Bonds Corner and Long Valley Dam, California and Cerro Prieto, Baja California.

2

LONG VALLEY DAM -5/25/80, 1649 uTc:ML:6.0

--- ----- --- --------- - - - - - - - - -

L

v

_T _____ ._, • ._,._-._r\)'v\....,I'I'JV""

Lo.19g

LONG VALLEY DAM -5/25/80, 1944 uTc:ML=6.1

------------ -------- ---- - - ----- - - ·- -

_v_~~'v~W~~/'J.;J~~MI'W/""""""''"I..d'....-'\f'-vo,('l'-...._.,..---..,..r-. ________________ _

_ T_~~~~·v"·lv-v}~/~.-,.r\.JI~Jv/'.j\.l~rr-JV~ • ·- l ' v

L.._0.49g

LONG VALLEY DAM -5/27/80, 1450 uTc:ML:6.2

-

1 1-.. ~s-I

·-----------~ -~-- --~.=/-0.9~~-------------------------------------

Figure 1.- continued.

3

Table 2.- Strong-motion data from the Horse Canyon (Anza) earthquake of February 25, 1980

Strong-motion station Ground acceleration Name, Coordinates Epicentra1 Azimuth2 Peak Duration3 Owner, distance1 (_g) ( s) I.D. number (km)

Anza Fire Station 33.556 N 12. 1 315 0.073 USGS 116.673 w Up .041 5160 225 .067

Borrego Air Ranch 33.19 N 41.4 315 .032 USGS 116.28 w Up .016 5049 225 .040

Cabazon Post Office 33.92 N 49.2 270 .017 USGS 116.78 w Up .011 5073 180 .016

Cherry Valley 33.98 N 65.3 295 .011 USGS 116.99 w Up .011 5074 205 .011

Coachella Canal Sta. l 33.64 N 42.4 135 USGS 116.08 w Up .021 2063 045 .030

Cranston Forest Sta. 33.74 N 36.3 135 .110 1-peak USGS 116.84 w Up .038 5042 045 .094

Fun Valley 33.93 N 47.7 270 .028 USGS 116.40 w Up .011 5069 180 .033

Hemet City Library 33.748 N 46.1 270 .057 CDMG 116.965 w Up .058 C266 ( 5091) 360 .046

Hurkey Creek Park 33.67 N 20.6 135 .076 USGS 116.68 w Up • 101 1-peak 5043 045 .097

Indio 33.75 N 38.5 315 .094 USGS 116.21 w Up .020 5067 225 .060

See footnotes at end of table

4

Table 2.- Strong-motion data from the Horse Canyon (Anza) earthquake of February 25, 1980 - continued

Strong-motion station Ground acceleration Name, Coordinates Epicentryl Azimuth2 Peak Duration3 Owner, distance (g) (s) I.D. number (km)

Mathews (Dike: Toe) 33.852 N 91.3 245 0.015 USGS 117.451 w Up .011

707 155 .011

Morongo Valley 34.05 N 58.8 135 .016 USGS 116.58 w Up .016 5071 045 .016

N. Palm Springs 33.92 N 44.4 300 .022 .USGS 116.54 w Up .028 5070 210 .017

Palm Desert 33.762 N 29.5 360 .094 CDMG 116.407 w Up .054 C284 (5132) 090 .072

Pinyon Flat Observ. 33.61 N 12.0 135 • 133 0.5 USGS 116.46 w Up .058 5044 045 .118 1-peak

Puerta La Cruz 33.32 N 25.3 350 .114 0.3 CDMG 116.68 w Up .090 Cl68 (933) 260 • 181 0.3

Rancho De Anza 33.35 N 20.5 135 .096 USGS 116.40 w Up .051 5047 045 .096

Sage 33.580 N 36.1 335 .084 CDMG 116.932 w Up • 174 0.2 c 118 ( 901) 245 • 111 1-peak

San Bernardino Hilton 34.065 N 90. 1 070 .016 CDMG 117.279 w Up .008 C287 (5134) 160 .027

San Jacinto 33.784 N 47.1 360 .062 CDMG 116.948 w Up .052 C203 {5005) 270 .080

San Jacinto 33.80 N 43.6 025 .047 CDMG 116.88 w Up .064 C204 {5006) 295 .044

See footnotes at end of table

5

Table 2.- Strong-motion data from the Horse Canyon (Anza) earthquaKe of February 25, 1980 - continued

~trong-motion station Name, Owner, I.D. number

Terwi 11 iger Valley USGS 5045

Thousand Palms P.O. USGS 5068

Whitewater Trout Farm USGS 5072

Coordinates

33.48 N 116.59 w

33.82 N 116.40 w

33.99 N 116.66 w

Epicentral distancel

(km)

5.8

35.9

53. 1

Ground acceleration Azimuth2 Peak Duration3

(_g) (s)

135 0.088 Up .063 045 . 123 0.6

135 .050 Up .049 045 .082

270 .016 Up .022 180 .022

Distance from epicenter at 33.51 N. lat., 116.53 W. long. When coordinates of station and/or source are listed to 0.01 degree, the implication is an accuracy in epicentral distance of approximately l km; a program of upgrading all station coordinates to 0.001 degrees is under way.

2 Azimuthal direction (degrees clockwise from north) of case acceleration for upward trace deflection on accelerogram; vertical component listeo as Up or Dow11.

3 Time between first and last peaks of acceleration greater than 0.10 ~·

6

The Long Valley Dam strong-motion station is located in Owens Valley, Calif. , at Lake Crowley ; the dam abutments are founded on Pleistocene volcanic rock (Bishop Tuff). The left abutment instrument is housed in a pre­fabricated corrugated iron shelter mounted on a concrete pad about 2x2x0. 3 m thick; less than 0.5 m of soil is present between the base of the pad and bedrock (R. McJunkin, oral commun., 1982).

The Cerro Prieto strong-motion station is located near the rim of Cerro Prieto volcano in Baja California, Mexico; the instrument is mounted in a 0.5x0.7x0.3-m-high metal enclo­sure. The accelerograph is attached to a 0.8xl. 2 m concrete pad situated on a blocky basaltic material at an elevation of 170 m (J. Anderson, oral commun, 1982).

In addition to earthquake magnitudes, one notable similarity is that the events triggered three stations that contain SMA-1 triaxial accelerographs equipped with flexure-type 1 .9. accelerometers, which have a natural frequency of 25 Hz, 60 percent critical damping, band­width of 0.1-25 Hz, and a sensitivity or maxi­mum 1 .9. deflection of about 18 mm on 70-mm photographic film. To reconfirm the validity of the apparently unusual high-frequency response during the strong ground motion, plans have been fmade to .install RFT -250 accelero­graphs (with totsion-type accelerometers) alongside and interconnected with the SMA-1 in­struments at Bonds Corner and Long Valley Dam left abutment. It is hoped that future recor­dings from these stations will contain some indication of the origin and nature of these high-frequency, large amplitude spikes. These peak accelerations may not be representative and may have biased acceleration data for stations at similar distances in ground-motion attenuation studies.

The records from Bonds Corner and Cerro Prieto have been digitized and are available from the Environmental Data and Information Service; the Long Valley Dam processed data is available from CDMG (see "Data Sources," this report).

References: Anderson, J. G., Prince, J., Brune, J. N., and

Simons, R. S., 1982, Strong-motion accel­erograms, in Anderson, J. G., and Simons, R. S., eds., The Mexicali Valley earthquake of 9 June 1980: Earthquake Engineering Research Institute Newsletter, v. 16, no. 3, p. 79-83.

Porcella, R. L., and Matthiesen, R. B., 1979, Preliminary report on the U.S. Geological Survey strong-motion records from the October 15, 1979, Imperial Valley earth­quake: U.S. Geological Survey Open-File Report 79-1654, 41 p.

Turpen, C. D., 1980, Strong-motion records from the Mammoth Lakes earthquakes of May 1980: California Division of Mines and Geology Preliminary Report 27, 42 p.

7

REVISED STRONG-MOTION 'DATA, PART I

By R. L. Porcella

One of the primary purposes of this program report is to disseminate periodically strong­motion information and data from the U.S. Geological Survey's National Network to the international earthquake engineering commu­nity. USGS strong-motion data is currently published triannually and includes the azimuth, duration, and amplitude of peak accelerations greater than 5 percent .9.; these amplitudes are scaled from the original records and are listed to the nearest one-hurdredth of a .9. (see table 1, for example). This peak-motion data has been used often in recent years in studies of the attenuation characteristics of horizontal ground acceleration for varying earthquake magnitudes, source-site distances, source mechanisms, and recording-site conditions (see for example, Tri funac and Brady, 1976; Hanks and Johnson, 1976; Boore and others 1978, 1980; Boore and Porcella, 1980; Campbell, 1981; Hanks and McGuire, 1981; and Joyner and Boore, 1981).

Because of the recent and dramatic increase in strong-motion data at both far- and near­source distances, it has become apparent that more detailed lists of the recorded ground accelerations and also source-site distances for selected earthquakes would be useful to various seismological studies including ground­motion attenuation. Data from the Horse Canyon (Anza) :earthquake of February 25, 1980 ( Por­cella, 1982), has been re-scaled to one-thou­sandth of a .9. and together with recordings from the California Division of Mines and Geology's Office of Strong-Motion Studies is presented in table 2; also listed are epicentral distances. Additional strong-motion data that have been or will be re-scaled are related to California earthquakes near El Centro and Coyote Lake (Gilroy) in 1979, and Livermore in 1980; the amended results will be published in future issues of this program report.

References: Boore, D. M., Joyner, W. B., Oliver, A. A., III,

and Page, R. A., 1978, Estimation of ground motion parameters: U.S. Geological Survey Circular 795, 43 p.

1980, Peak acceleration, velocity, and --displacement from strong-motion records:

Bulletin Seismological Society America, v. 70' p. 305-321.

Boore, D. M., and Porcella, R. L., 1980, Peak acceleration from strong-motion records: g

postscript: Bulletin of the Seismological Society of America, v. 70, p. 2295-2297.

Campbell, K. W., 1981, Near-source attenuation of peak horizontal acceleration: Bulletin of the Seismological Society of America, v. 71, p. 2039-2070.

Hanks, T. C., and Johnson, D. A., 1976, Geophy­sical assessment of peak accelerations:

Bulletin of the Seismological Society of America, v. 66, p. 959-968.

Hanks, T. C. and McGuire, R. K., 1981, The char­acter of high-frequency strong ground motion: Bulletin of the Seismological Society of America, v. 71, p. 2071-2095.

Joyner, W. B. and Boore, D. M., 1981, Peak hori­zontal acceleration and velocity from strong-motion records including records from the 1979 Inperial Valley, California earthquake: Bulletin of the Seismologicai Society of America, v. 71, p. 2011-2038.

Porcella, R. L., ed., 1982, Seismic Engineering . Program Report, January - April 1980, 21 p.

Tr1funac, M.D., and Brady, A. G., 1976, Cor­relations of peak acceleration, velocity, a~d displacement. with ea!thquake magnitude, d1starce, and s1te cond1 tions: Earthquake Engineering and Structural Dynamics, v. 4, p. 455-471.

THE NEW MADRID STRONG-MOTION NETWORK

By R. L. Porcella

The U.S. strong-motion instrumentation program in the central United States began in July 1969 when the U.S. Coast and Geodetic Survey established a strong-motion station at S~uthea~t Miss~uri College in Cape Gi-\ardeau, M1ssour1. Dur1ng the following 6 years 13 additional stations were established prim~rily as a result of joint USGS programs with the U.S. Army Corps of Engineers (COE) and the Veterans Administration (VA); the programs were developed largely in response to the 1971 San Fernando, Calif., earthquake that severely ~a~aged the Olive View and VA hospital facil­Ities and caused near failure of the lower San Fernando Dam.

Dams in the New Madrid seismic zone that have been instrumented under the USGS-COE program include those at Arkabutla and Sardis Lakes, Mississippi; Wappapello Lake, Missouri; Barkley Lake, Kentucky; and Smithland Locks and Rend Lake, Illinois (fig. 2; table 3). The typical COE strong-motion installation in this zone includes an earthfill embankment and appurtenant structures instrumented with from three to six triaxial accelerographs at various locations including the crest, toe, downstream abutment, spillway, and outlet tower. '

VA hospitals in the New Madrid network that ~ere instrumented under the USGS-VA program Include those at Memphis, Tennessee; Marion Illinois; and Poplar Bluff and St.· Louis' Missouri (fig. 2; table 3). In 1973, a tri~ axial accelerograph generally was installed in the basement of the major building at each of these facilities for the purpose of measuring the base motions of large hospital buildings during potentially damaging earthquakes (Porcella, 1978). Additionally, strong-motion stations were established at the Noranda aluminum plant near New Madrid, Missouri, in

8

' 1972 and at Reelfoot Lake near Tiptonville, Tennessee, in 1975.

Based on recent microearthquake activity, historical seismicity, and the lower atten­uation of ground motion associated with earth­quakes in the central United States, a study by Matthiesen (1978) suggested that a uniform rate of strong-motion recording might be expected for the Mississippi embay.ment region - - com­parable to rates associated with the Transverse Ranges or segments of the Hayward or Calaveras faults in California. During the latter part of 1977 and in 1978 the USGS established 14 of 25 additional strong-motion stations designated for inclusion in a 40-station, variable-grid network incorporating two roughly perpendicular arrays in the northern part of the Mississippi River embayment. One array will extend along the axis of the embayment from Forrest City, Arkansas, to Cairo, Illinois, at 15-50 km spacings; the second array will extend from the lower Paleozoic sedimentary rock at Poplar Bluff, Missouri, across the Quaternary alluvial deposits and Eocene sedimentary rock of the embayment to the Cretaceous sedimentary rock at Paris, Tennessee (fig. 2; Willden and Carlson, 1968). The placement of these stations was primarily based on recently recorded micro­seismic activity (see, for example, Stauder and others, 1980) and the geology of the embayment region. The primary purposes of establishing the New Madrid network are: (1) to obtain strong-motion data for use in quantitative studies of the differences in the attenuation of ground motion in this region as compared with California and the western United States and ( 2) to determine the spectral character­istics of strong ground motion in the embayment region, and the variation of these character­istics as they relate to the source mechanism, travel path geometries, regional geologic setting, and local site conditions (Porcella, 1978). Detailed geophysical studies at strong­motion sites that include measurement of P- and S-wave velocities are anticipated as part of the various aftershock activities that will be undertaken when a significant set of ground­motion data is recorded in the New Madrid seismic zone.

Three earthquakes have been recorded at stations in the New Madrid network; a magnitude 4.5 event on June 13, 1975, a magnitude 5.0 event on March 24, 1976, and a magnitude 4.5 aftershock of the March 24 earthquake (see table 4). The June 13, 1975, earthquake trig­gered the accelerograph at the New Madrid station and produced a maximum recorded accel­eration of 0.076 ~ at an epicentral distance of about 10 km. The March 24, 1976, earthquake near Marked Tree, Arkansas, triggered seven accelerographs at four stations located at epi­central distances of 104 to 144 km; the March 24 aftershock triggered one station at an epi­central distance of 107 km (table 4) . These nine accelerograms represent the entire strong-

38'N

97"W

EX PlANA liON

Strong-motion station( owner)

• U.S. Geological Survey

• Veterans Administration

A Army Corps of Engineers

0 Federal Highways Administration

Q Pion ned installation (USGS)

1fTf) Mississippi Embayment, Cenozoic

QJ_l_i) deposits (approximate)

rTD 1974- 1980seismicity

~ (approx1mote)

50 100 KllCII.\ETERS

August 1980

MISSOURI

ARKANSAS

REND lAKE DAM

Geology from Willden and Carlson, 1968; seismicity from StLouis University, 1980

Figure 2.- New Madrid Strong-Motion Network.

9

Table 3.- Accelerograph stations in the New Madrid Strong-Motion Network

Station, Owner, I.D. no.

Coordinates Structure type, Size

Instrument location(s)

Date Loca 1 installed geology

Arkabutla Dam, Miss. 34.76 N ACOE, 2444 90.12 W

Barkley Dam, Ky. 37.02 N ACOE, 2427 88.22 W

Blytheville, Ark. 35.928 N Fire Station #2 89.926 W USGS, 2449

Cairo, Ill.' Fire Station USGS, 2451

Campbell, Mo. Fire Station USGS,2454

37.003N 87.173W

36.494 N 90.075 w

Cape Girardeau, Mo. 37.316 N SE Mo. State College 89.529 W USGS, 2403

Corning, Ark. Post Office USGS, 2455

Dexter, Mo. Fire Station #2 USGS, 2457

Dyersburg, Tenn. Fire Station #2 USGS, 2461

Gideon, Mo. City Hall USGS, 2456

Hayti, Mo. Medical Center USGS, 2448

Interstate 55 Rte P Bridge FHWY, 2477

36.41 N 90.58 w

36.796 N 89.966 w

36.05 N 89.39 w

36.454 N 89.919 w

36.237 N 89.740 w

36.66 N 89.67 w

earth dam, 3940x2l m hi. embankment

abutment, 5-21-73 Tertiary toe, crest sed. rock

earth dam crest, abut., 1-14-75 Cretaceous downstream, sed. rock spillway(2)

wood/brick, steel frame, 1-story bldg.

ground 10-22-77 Quaternary level alluv.

concrete block, ground steel frame, level 1-story bldg.

concrete block, ground steel frame, level 1-story bldg.

reinforced concrete, 2-story bldg.

basement

concrete block, ground 1-story bldg. level

pre-stressed ground concrete, level 1-story bldg.

concrete block, ground steel frame, level 1-story bldg.

concrete block, ground brick veneer, level 1-story bldg.

reinf. cone., ground brick veneer, level 3-story bldg.

reinf. cone., 13 channel, cone. piles, remote 64 m-long brdge recording

10

deposits

10-17-77 Quaternary a 11 uv. deposits

10-18-77 Tertiary

7-3-6~

sed. rock

Ordovician sed. rock

10-19-77 Quaternary

7-16-78

alluv. deposits

Tertiary sed. rock

7-17-78 Tertiary sed. rock

10-20-77 Quaternary alluv. deposits

10-22-77 Quaternary a 11 uv. deposits

10-20-80 Quaternary alluv. deposits

Table 3.- Accelerograph stations in the New Madrid Strong-Motion Network .:.. continued

Station, Coordinates Structure Instrument Date Local Owner, I.D. no. type, Size location(s) installed geology

Lepanto, Ark. 35.613 N concrete block, ground 7-12-78 Quaternary Fire Station 90.330 w steel frm roof, level a 11 uv. USGS, 2458 1-story bldg. deposits

Marion, Ill. 37.72 N 8-stall garage, ground 5-14-73 Pennsylvanian V.A. Hospital 88.95 w 1-story bldg. level rock VA, 2411

Memphis, Tenn. 35.14 N 13-story bldg. basement 5-12-73 Quaternary V.A. Hospital 90.03 w a lluv. VA, 2410 deposits

New Madrid, Mo. 36.51 N concrete block, ground 2-29-72 Quaternary Noranda Plant 89.57 w 1-story bldg. level a lluv. USGS, 2420 deposits

Norfork Dam, Ark. 36.25 N concrete dam, crest, 12-8-71 Ordovician ACOE, 2401 92.23 w 800x66 m hi. lower gallery sed. rock

Obion, Tenn. 36.259 N concrete block, ground 7-15-78 . Quaternary Po 1 i c e Dept • 89.192 w steel/tin roof, level alluv. USGS, 2460 1-story bldg. deposits

Paragould, Ark. 36.06 N concrete block, basement 7-13-78 Tertiary Post Office 90.49 w 1-story bldg. sed. rock USGS, 2459

Poplar Bluff, Mo. 36.77 N reinf. cone., basement 5-11-73 Ordovician V.A. Hospital 90.42 w 6-story bldg. sed. rock VA, 2409

Portageville, Mo. 36.428 N cone. block, ground 10-18-77 Quaternary Post Office 89.704 w steel/tin roof, level alluv. USGS, 2452 1-story bldg. deposits

Rend Dam , I 11 . 38.02 N earth dam, crest, 4-27-74 Pennsylvanian ACOE, 2422 88.99 w 3230x16 m hi. toe, rock

embankment spillway

St. Louis, Mo. 38.64 N 10-story bldg. basement 5-10-73 Mississippian Cochran Hospital 90.23 w sed. rock VA, 2408

St. Louis, Mo. 38.49 N 1-story bldg. ground 5-9-73 Mississippian Jeff. Barracks Hosp. 90.28 w level sed. rock VA, 2407

11

Table 3.- Accelerograph stations in the New Madrid Strong-Motion Network - continued

Station, Coordinates Structure Instrument Date Local Owner, I. D. no. type, Size location(s) installed geology

Sardis Dam, Miss. 34.41 N earth dam, abutment, 5-22-73 Tertiary ACOE, 2445 89.80 w 4667x30 m hi. toe, crest sed. rock

Sikeston, Mo. 36.883 N cone. block, ground 10-16-77 Quaternary Fire Station 89.580 w stl/wood roof, level a lluv. USGS, 2453 1-story bldg. deposits

Smith 1 and Dam, Ill. 37.164N earth dam, freefield(2), 5-1-78 Mississippian ACOE, 2462 88.433 w gated section, upper gallery sed. rock

( 2) locks of 1 ocks

Tiptonville, Tenn. 36.37 N wood frame, ground 12-5-75 Quaternary Reelfoot Lake 89.41 w 1-story bldg. level a 1l uv. USGS, 2446 deposits

Union City, Tenn. 36.426 N cone. block, ground 10-21-77 Tertiary Fire Station 89.061 w stl/conc. roof, level sed. rock USGS, 2450 1-story bldg.

Wappapello Dam, Mo. 36.93 N earth dam, crest, toe, 5-25-73 Ordovician ACOE, 2415 90.27 w 830x34 m hi. spillway sed. rock

embankment

12

Table 4.- Strong-motion data from the New Madrid seismic zone

Earthquake*

June 13, 1975 2240 UTC S.E. Missouri 36.54N, 89.68W Magnitude 4.3

March 25, 1976 0041 UTC N.E. Arkansas 35.59N, 90.48W Magnitude 5.0

March 25, 1976 0100 UTC N. E. Arkansas 35.61N, 90.48W Magnitude 4.5

Name (Owner)

Station

New Madrid, Mo. No rand a P 1 ant (USGS)

Arkabutla Dam, Miss. (ACOE)

Toe Crest Abutment

Wappapello Dam, Mo. (ACOE)

Toe Crest

Tiptonville, Tenn. Reelfoot Lake (USGS)

New Madrid, Mo. Noranda Plant (USGS)

Coordinates

36.51 N 89.57 w

34.76 N 90.12 w

36.93 N 90.27 w

36.37 N 89.41 w

36.51 N 89.57 w

Epicentral distance

( km)

10

104

144

120

130

Peak acceleration

(~)

0.076

.04

.02

.02

.02

.02

.02

.02

Note: Operational stations not triggered and their epicentral distances include Memphis, Tenn. (72 km), Poplar Bluff, Mo. (128 km), Sardis Dam, Miss. (144 km), and Wappapello Dam Spillway (144 km); non-triggering indicates acceleration less than 0.01 ~(triggering threshold).

Arkabutla Dam, Miss. 34.76 N 107 (ACOE) 90.12 w

Toe .01

Note: Crest and abutment stations not triggered.

* Event information from Preliminary Determination of Epicenters, published by the U.S. Geological Survey.

13

motion database presently available for the New Madrid seismic zone. These data have been pro­cessed and the raw digitized accelerograms, calculated ground accelerations, velocities, and displacements are available in Herrmann (1977).

Although the current database is inade­quate, it is anticipated that a future earth­quake (magnitude 5 1/2 or greater) in the Mississippi Embayment region will trigger most of the stations in the expanded New Madrid network and provide a significant and unique strong-motion data set for use in the investi­gation of the spectral characteristics and attenuation of ground motion and in seismolo­gical and earthquake hazards studies of the central United States.

References: Herrmann, R. B., 1977, Analysis of strong-motion

data from the New Madrid seismic zone: 1975-1976: National Science Foundation, RANN Grant ENV 76-20875, St. Louis Univ., St. Louis, Mo. 63103, 144 p.

Matthiesen, R. B., 1978, On the development of strong-motion instrument networks in the United States: U.S. Geological Survey Open-File Report 78-1024, 91 p.

Porcella, R. L., 1978, Strong-motion instrumen­tation in the central and eastern United States: Earthquake Notes, v. 49, n. 2, p. 3-14.

Stauder, W., Herrmann, R., Singh, S., Perry, R., Haug, E., and Morrissey, S., 1980, Central Mississippi Valley Earthquake Bulletin, St. Louis University, St. Louis, Mo. 63103, 44 p.

Willden, R., and Carlson, J. E., 1968, Transcon­tinental geophysical survey (35°-390N), geologic map from 87° to l00°W longitude: Miscellaneous Geologic Investigations Map I-534-C, scale 1:1,000,000.

SUMMARIES OF RECENT STRONG­MOTION REPORTS*

GUIDELINES FOR STRONG-MOTION INSTRUMENTATION OF HIGHWAY BRIDGES

By Christopher Rojahn and J. D. Raggett

This report suggests guidelines for the strong-motion instrumentation of highway grade separation bridges. It has been written for the civil or structural engineer who is not familiar with the objectives of strong-motion instrumentation programs, the instrumentation utilized in such programs, and where and how to install that instrumentation.

The report is divided into 10 principal sections. The first section is a general dis­cussion on strong-motion instrumentation and records. In the second and third sections, instrumentation program objectives and criteria for selecting a bridge for stro~-motion in­strumentation are introduced. The fourth

14

section is a discussion on the linear dynamic behavior of bridges that is designed to familiarize the reader with the theoretical aspects of bridge response. In the fifth section, the failure of highway bridges during the 1971 San Fernando earthquake is discussed, and in the sixth section, recommended guide­lines for instrument placement on and adjacent to bridge structures are presented. The seventh and eighth sections describe recom­mended instrumentation types, installation techniques, and maintenance requirements, and the ninth contains a complete description of an actual strong-motion instrumentation scheme installed on a continuous two-span bridge near El Centro, California. The last (tenth) sec­tion contains concluding remarks, followed by a list of references and an appendix containing a discussion on the positive and negative aspects of recording various quantities of motion.

This document was prepared by the U.S. Geological Survey for the Offices of Research and Development of the Federal Highway Administration, U.S. Department of Transpor­tation (FHWA Purchase Order 5-3-0195); it is available to the public through the National Technical Information Service (NTIS; see "Data Sources," this report).

*Inclusion of strong-motion information sources is intended as a service to our readers and does not imply endorsement of these reports by the U.S. Geological Survey.

RECENT AWARDS IN ENGINEERING

National Science Foundation Directorate for Engineering

Washington D.C. 20550

The National Science Foundation's Direc­torate for Engineering supports basic and applied research that improves our knowledge of fundamental engineering principles and provides the knowledge needed to advance engineering technology. The Directorate also seeks to strengthen our Nation's academic engineering base by its support of research at academic institutions, and through such activities as research equipment grants and special award programs for new investigators.

The Directorate consists of four Divisions and the Office of Interdisciplinary Research. One of these Divisions, Civil and Environmental Engineering ( CEE), supports research on struc­tures and phenomena involving the Earth's sur­face (such as near-surface solids, e.g., soils, rocks, and ice, foundations and dams), the design of structures, and the flow of above­and below-ground water. Such research is fun­damental to the development and building of structures and facilities, to minimize the negative impact of the natural environment on them.

The programs of CEE include earthquake hazard mitigation (EHM), which supports research in many disciplines to develop an understanding of how earthquakes impact natural and manmade facilities in order to reduce casualties, damage, and social and economic disruption. This program consists of three subelements:

Design Research Aims to develop procedures for performing dynamic analysis of proposed or existing construction under earthquake loadings, to develop an understanding of material components subjected to damaging dynamic loads, and to develop procedures for the analysis and design of nonstructural and architectural systems subject to earthquake loadings. Siting Research Seeks to determine from instrumental data the nature of strong ground shaking during earthquakes, to develop analyt1cal procedures to predict the spatial and temporal distribution of strong ground motion at different sites, to understand the dynamic behavior of soil and rocks subject to strong shaking, and to understand the behavior of the ocean, particularly its margins, due to underwater earthquakes producing damaging tsunamis. Societal Response Research Studies and evaluates measures used to mitigate society's loss due to earthquake (and other natural hazards) impacts, includit'lg emergency preparedness, land use planning, building codes, insurance and other economic incentives, and information and education, so that communities can organize themselves to withstand disasters with minimal impact on life and property.

Recent Awards in Engineering is a new publication. It provides information on the research awards made in each fiscal year quarter by the Directorate for Engineerin~ and is aimed at those researchers, educators, administrators, and users who wish to keep abreast of the research being supported in various technical areas.

To receive future issues of Recent Awards in Engineering, send name and address to National Science Foundation, Directorate of Engineering, Program Analyst for Communi­cations, Room 11108, 1800 G Street NW, Washington, D.C. 20550.

UNITED STATES STRONG MOTION PROGRAMS

By R. D. Borcherdt and R. B. Matthiesen

Safeguarding life and property from the destructive effects of earthquakes is a major national as well as worldwide problem. Because the most widespread destructive effects of

15

earthquakes are due to stro171g· shaking, either directly through shaking-induced structural damage, or indirectly through shaking-induced ground failures, effective programs to measure strong ground motions generated by earthquakes are vital to national as well as international efforts to reduce earthquake hazards. Strong­motion programs in the United States are supported by a number of Federal and State agencies with coordination provided by a national program operated by the u.s. Geolo­gical Survey and supported by the National Science Foundation. The cooperative national program is designed to collect, analyze, and disseminate structural-response and ground­motion data. Agencies developing centers to process strong-motion data include the U.S. Geological Survey, the California Division of Mines and Geology, the Uni ve:tsity of Southern California, and Stanford University. Automatic digitization procedures and interactive soft­ware being developed at the centers permit rapid processing and dissemination of the data to interested researchers. The extreme impor­tance of obtaining strong-motion data at dis­tances less than 40 kms from large (M greater than 7) earthquakes provides an urgent need for international cooperative efforts to acquire and disseminate near-field strong-motion data.

Reference: Proceedings of the Seventh World Conference on Earthquake Engineering, September 8-13, 1980, Istanbul Turkey: v. 2, Part II, p. 9-16.

INTERPRETATION OF STRONG-MOTION EARTHQUAKE RECORDS OBTAINED IN AND (OR} NEAR BUILDING-S

By Gary C. Hart, Christopher Rojahn, and J.T.P. Yao

The material contained in this report constitutes the proceedings of the workshop on Interpretation of Strong-Motion Earthquake Records Obtained in and (or) near Buildings. The workshop was sponsored by the National Science Foundation and was held on April 1 and 2, 1980, at the San Francisco Airport Hilton. The main purpose of the workshop was to review existing building strong-motion instrumentation programs, to document existing procedures for processing and interpreting data from those programs, and to identify ways to improve data acquisition, analysis, and interpretation techniques.

This report presents a state-of-the-art summary of the various components of existing building strong-motion earthquake instrumen­tation programs. Instrumentation location, data analysis, and design applications are discussed. Recommendations are proposed.

Reference: Workshop proceedings, San Francisco, Calif., April 1-2, 1980: Mechanics and Structure Department, UCLA, Los Angeles, Calif. 90024, UCLA Report No. 8015, 137 p.

PROCESSED DATA FROM THE GilROY ARRAY AND COYOTE CREEK RECORDS, COYOTE lAKE,

CAliFORNIA, EARTHQUAKE OF AUGUST 6, 1979

By A. G. Brady, P. N. Mark, V. Perez, and L. D. Porter

This report contains plots of the results of corrpleted processing performed on the six close-in strong-motion records obtained from the Coyote Lake earthquake of August 6, 1979. Additional copies may be obtained from the USGS Open-File Services Section or the California Division of Mines and Geology (see "Data Sources," this report). Digital data corres­ponding to the plots of the analysis sections 1, 2, and 3 (uncorrected data, corrected data, and response spectra, respectively) may be obtained on magnetic tape from the EiJIS (see "Data Sources," this report).

Reference: U.S. Geological Survey Open-File Report 81-42, 171 p. and California Division of Mines and Geology Preliminary Report 24.

GEOlOGIC DESCRIPTION OF SElECTED STRONG-MOTION ACCElEROGRAPH SITES- PART V

By B. L. Silverstein

This report contains summaries of geologic and engineering data and information for strong-motion stations in Berkeley (4), Oakland (2), Pleasant Hill, San Francisco (5), and San Pablo. The information is taken from published and unpublished sources on file with the Seis­mic Engineering Branch, U.S. Geological Survey, and includes station information, a location map, core data, lithologic logs, and a narra­tive of local or site geology.

Reference: U.S. Geological Survey Open-File Report 80-1140, 30 p. (see "Data Sources," this report).

IN-SITU MEASUREMENTS OF SEISMIC VElOCITY AT 27 lOCATIONS IN THE

lOS ANGElES, CAliFORNIA, REGION

By James F. Gibbs, Thomas E. Fumal, and Edward F. Roth

Studies conducted in the San Francisco Bay Region have shown that average shear-wave velocity can be readily tied to quantitative estimates of ground motion such as ground amplification and earthquake intensity. fur­thermore, when certain physical properties of the geologic materials such as texture, hard­ness, and fracture spacing are observed during geologic mapping, a method can be used to predict shear-wave velocity from the descrip­tions a f geologic units. By measuring shear­wave velocities in key units together with the above data, regional maps depicting the earth-

16

quake shaking hazard can be compiled. The goals of the current program are to

provide shear-wave data in the Los Angeles area to compare with that in the San Francisco Bay region where high-strain intensity data are available. Data from 27 locations are summa­rized in this report as part of a continuing project to seismically zone the Los Angeles area. Reference: U.S. Geological Survey Open-File

Report 80-378, 167 p. (see "Data Sources," this report).

STRONG-MOTION INFORMATION, DATA REPORTS, AND AVAILABILITY OF DIGITIZED DATA

U.S STRONG-MOTION NElWORK DATA

A strong-motion information retr~eval system ( SMIRS) has been developed at the USGS to provide up-to-date information &bout strong-motion records and the circumstancc;;S in which they were recorded. The system is accessible through a data terminal (30 cps, half duplex) . The system is operational, but the information within it is incoopletc and needs to be verified. A user's manual is available (Converse, 1978). To retrieve information, dial (415) 329-8600 and place the telephone handset into the terminal. Whan the carrier light comes on, press the "line-feed" key and wait for the cofll)uter to responu (two lines will be printed); type the following:

enter yourname SMIRS Type the "enter" and "SMIRS" exactly as st10wn above, but replace "yourname" with your own name. The word "enter" is five low~rcase characters followed by one space; your name is typed as one continuous character string and followed by one space; and "SMIRS" is five uppercase characters. Type the carriage-return key and then the line-feed key; you w~ll be given instructions.

The strong-motion records from the February 9, 1971, San Fernando, California, earthquake and most of the significant records priur to that event have been digitized by the Cali­fornia Inc:;titute of Technology (CIT) (huason, 1976). Processing and analysis of the data have been presented in a series of reports con­taining (1) uncorrected digital data, (2) cor­rected accelerations, velocities, and di5~lace­ments, (3) response spectra, and (4) r-ourier amplitude spectra. All of these data 1eports are available through the National Technical Information Service (NTIS, see "Data Suurces," this report). The digitized data from tne CIT digitization program are available from the Environmental Data and Information Service (EDIS) and the National Information Serv1ce for Earthquake Engineering at the Univerc:;ity of California, Berkeley (NISEE, see "Data Sources," this report). The magnetic tape digital data from subsequent years w1ll be available from EDIS and NISEE at approximately the same time as the data reports are published.

Refererces : Converse, April, 1978, Strong-motion informa­

tion retrieval system user's manual: U.S. Geological Survey Open-File Report, 79-289, 51 p.

Hudson, D. E. , 197 6, Strong-motion earthquake accelerograms - index volume: California Institute of Technology, EERI report 76-02, 72 p.

CALIFORNIA DIVISION OF MINES AND GEOLOGY STRONG-MOTION DATA

Processed strong-motion data from selected earthquakes are available from the California Division of Mines and Geology. The data have been prepared by the interim CDMG strong-motion data processing system. This system is composed of a series of programs that have been developed by the California Institute of Technology, the U.S. Geological Survey, and the California Division of Mines and Geology, with special emphasis on the handling of long­duration film records from multiple-channel central recording instruments.

The data are grouped by phase: Phase I Uncorrected accelerations, Phase II Corrected accelerations,

velocities, and displacements, Phase III Response spectra. Each phase contains three-channel subgroups

arranged by station. At the present time, data from the following earthquakes have been processed:

Santa Barbara earthquake of August 13, 1978

Station

UCSB Goleta UCSB North Hall Freitas Building

Channels

3 9 9

'Imperial Valley earthquake of October 15, 1979

El Centro free-field 3 Imperial County Services Bldg. 13

The data are available on standard nine-track tapes, along with a microfiche copy of the tape contents. Interested parties should contact the CDMG Office of Strong-Motion Studies (see "Data Sources," this report).

It is the policy of the CDMG to make all strong-motion record data promptly available to the public in a manner consistent with good data management. Requests for copies of records, personal access to record or data files, and copies of data files should be made to the Chief, Office of Strong-Motion Studies (OSMS), and should specify identity and medium of materials to be provided or reviewed. Desired access or delivery dates should be

17

speci fie. When a request for copies of materials or personal access to files is received, OSMS staff will provide the requested material or will set an appointment time for personal review of files; the requestor will be notified immediately of any signi fie ant delay or other problems that prevent meeting the request. Charges for copying or other processing of materials will be based on the actual cost of producing and delivering the items, and OSMS will retain control of originals and master copies of all items.

FOREIGN STRONG-MOTION DATA

Because of the long history of close cooperation between the United States and the Central and South American strong-motion programs, much of the data from those programs are available from the same sources as the United States data (see below). Information about strong-motion data from the Western Hemisphere will be included in the Strong-Motion Information Retrieval System operated by the USGS.

The USGS does not attempt to obtain first­class copies of records from those foreign organizations that prepare data reports comparable to those prepared by the USGS. Abstracts of the data reports from such organizations are presented in this Seismic Engineering Program Report series, and through informal arrangements, copies of the data and records are made available.

EDIS/NOAA WORLDWIDE STRONG-MOTION DATA

A worldwide collection of strong-motion seismograms for dissemination to the scientific and engineering community is available from World Data Center A for Solid Earth Geophysics and the National Geophysical and Solar­Terrestrial Data Center (NGSDC). Countries contributing to the strong-motion data base include Australia, Italy, Japan, New Zealand, Rumania, U.S.S.R., and Yugoslavia. The U.S. Geological Survey has furnished records from its network of cooperative strong-motion sta­tions, including those in Central and South America.

Copies of strong-motion records are avail­able on 35-mm film, on 70-mm film chips, as paper copies, and as digitized data on punched cards or magnetic tape. A list of most records can be obtained from the World Data Center A publication "Catalog of Seismograms and Strong­Motion Records," Report SE-6. This catalog can be ordered from NGSDC (EDIS/NOAA) for $3.00 (see "Data Sources," this report).

The most significant strong-motion records recorded in the United States and Latin America between 1931 and 1971 have been copied on seven reels of 35-mm film ( xl2 redu:tion) and 70-mm film chips (approximately x8 reduction). The

film chips· are available for $1.50 per chip; longer records are continued on additional chips. The 35-mm film copies can be purchased for $30 per reel, the complete set of reels for $180. There is a minimum charge of $10 per order.

Japan and Australia have supplied magnetic tapes of digitized data from stations locateo in the western Pacific Ocean (the Japanese Islands, New Guinea, and New Britain). A series of 400 United States strong-motion records (1933-1971) were digitized by the California Institute of Technology and are now availa?le on six magnetic tapes. The u.s. Geological Survey is digitizing post-1971 records from its network; they have generated 15 tapes of strong-motion records recorded from 1?67 to 1975 in the United States, Chile, Nicaragua, San Salvador, and Mexico.

Other digitized data include punched cards containing strong-motion records from the March 4, 1977, earthquake in Rumania (recorded in Buchar~st); the Gazli earthquake of May 17, 1976, In Uzbek, U.S.S.R.; and three earthquakes in the New Madrid seismic zone (located in midcontinental United States) in 1975 and 1976.

Recent acquisitions include a magnetic tape of strong-motion records triggered by a swarm of earthquakes that occurred in northern Italy near the town of Friuli in 1976; these were compiled by the National Commission for Nuclear Energy and have been given to the center for distribution. Other data include records obtained from California earthquakes near Santa Barbara in ~ugus~ 1978, Gilroy in August 1979, El Centro In October 1979, and Livermore in January 1980.

A table listing all digitized strong-motion records available on magnetic tape may be obtained free of charge from EDIS/NOAA. Digi­tized strong-motion records may be purchased either in punched card format at $60 per record (including all three instrument components) or in tape format at $80 per tape.

Checks or money orders should be made payable to "Commerce/NOAA/NGSDC"; inquiries should be addressed to EDIS/NOAA (see "Data Sources," this report).

18

DATA SOURCES

For reports or information regarding strong-motion records and data, address inquiries to the appropriate agency listed below:

1. Branch of Distribution U.S. Geological Survey 604 So. Pickett Street Alexandria, VA 22304

2. Earthquake Engineering Research Institute

2620 Telegraph Avenue Berkeley, CA 94704

3. EDIS/NOAA National Geophysical and

Solar-Terrestrial Data Center (D622)

Boulder, CO 80303

4. National Technical Information Service

5285 Port Royal Road U.S. Dept. of Commerce Springfield, VA 22161

( 804) 7 5 6-6141 (FTS) 756-6141

(415) 848-0972

( 303) 497-6764 (FTS) 320-6764

( 703) 487-4650 (FTS) 737-4650

5. NISEE/Computer Applications (415) 642-5113 519 Davis Hall, UC Berkeley Berkeley, CA 94720.

6. Office of Strong-Motion Studies

California Division of Mines and Geology

2811 "0" Street Sacramento, CA 95816

7. Open-File Services Section Branch of Distribution U.S. Geological Survey Box 25425, Federal Center Denver, CO 80225

(916) 322-3105 (FTS) 552-3105

(303) 234-5888 (FTS) 234-5888

8. Seismic Engineering Branch (415) 323-8111 U.S. Geological Survey ext 2881 345 Middlefield Road, MS 78 (FTS) 467-2881 Menlo Park, CA 94025.

Reference

CIT; EERL S-M earthquake accelerograms, digitized & plotted data; val II, III, IV; Part B; Record #037 (1966 Parkfield earthquake)

same as above: val I, II; Part C Record #041 (1971 San Fernando earthquake; Component direction­Pacoima Dam accelerogram)

USGS S-M Station No. 1250 Gilroy, Gavilan College (Component direction - all S-M records from Oct. 1972 to Aug. 1979)

USGS S-M Station 2420 New Madrid, Missouri (Component direction­events of 6-13-75 and 3-24-76)

ERRATA

Error

Temblor, Calif. No. 2 USGS Station No. 1097

35 45 1 07" N 120 15 1 52 11 w

L - S74W V - Down T - Sl6E

L - S67W V - Down T - S l3E

L - Sl9W V - Down T - S71E

USGS S-M Station no. 181; L - N36W Los Angeles, 640 Marengo, V - Down 1st floor (Component T - S54W direction prior to 7-15-70)

NOTE: Since 7-15-70, the 1st floor (also 4th floor and roof) component directions are:

USGS S-M Station No. 122; Glendale, California (Component direction -events of 4/8/68 and 2/9/71)

USGS S-M Station No. 125(828); Lake Hughes Array Station (1A) Component direction:

event 9/12/70

event 2/9/71

L - S70E V - Down T - S20W

L - N21E V - Down T - N69W

L - N21E v - Down T - S69E

19

Correction

Temblor, Cal if. USGS Station No. 1438

35 42 1 3611 N 120 10 I 12 11 W

L - N76W V - Down T - S14W

L - S67W V - Down T - S23E

L - West V - Down T - South

L - S54W V - Down T - S36E

L - N36W V - Down T - S54W

L - S72E V - Down T - Nl8E

L - S21W V - Down T - S69E

L - S21W V - Down T - S69E

Table 1. - Summary of acceZerograms recovered during May- August 1980

Event

7 August 1979-24 August 1979 Central California Epicenters and magnitudes unknown

13 Apri 1 1980 0616 UTC Central California 36.72N, 121.55W Magnitude 4.9

14 September 1979-5 May 1980 Central California Epicenter and magnitude unknown

25 May 1980-28 May 1980 Central California Epicenters and magnitudes unknown

25 May 1980-4 June 1980 Central California Epicenters and magnitudes unknown

Station name Station S-t2 Direction.3 l~iax ace 14 (owner)l coord. ( s) (_g)

APEEL Array Sta. 2E 37.66° N * ** Hayward 122.08° w (USGS)

Note: One additional record** recovered at APEEL station 2E.

Bear Valley: Sta. 12 Williams Ranch (USGS)

Bear Valley: Sta. 1 Fire Station (USGS)

36.658° N 2.4 121.249° w

36.573° N * 121.184° w

**

**

Note: May be related to central California earthquake of Apri 1 13, 1980.

New Melones Dam (ACOE)

Right abutment

Left abutment

Slope

Downstream

37.949° N * 120.524° w

**

**

**

**

Duration5 (s)

Note: Two each additional records** recovered at the left and right abutments, slope, and downstream stations.

Hidden Dam (ACOE)

Control Tower (upper 1 eve 1)

37.11° N * 119.88° w

**

Note: Two additional records** recovered at upper level. Instrument at lower level malfunctioned.

Fresno VA Hospital Basement (VA)

36.77° N 117.78° w

* **

See footnotes at end of table.

20

Table 1. - Summary

Event

25 May 1980-4 June 1980 -continued-

25 May 1980-5 June 1980 Central California Epicenters and magnitudes unknown

of aaaeZerograms recovered during May - August 1980 - continued

Station name (owner) 1

Dos Am igos Pumping plant (CDWR)

Level

Level 4

Note: One each

I sa be 11 a Dam (ACOE)

Crest

Toe

Lower spill way gallery

Station S-t 2

coord. ( s)

36.92° N * 117.78° ~i

additional records**

35.65° N 118.48° w

*

Direct ion 3 Max ace 14 Duration 5

(_~) ( s)

**

**

recovered at levels 1 and 4.

**

** **

Note: Two each additional records** recovered at crest, toe, and lower spillway gallery.

I sa be 11 a Aux. Dam (ACOE)

Crest

Tower

35.64° N * 118.47° w

** **

Note: Two each additional records** recovered at crest and tower.

Lake Success Dam (ACOE)

Downstream

Right abutment

Left crest

Left abutment

Right crest

Slope

36.061 o N 16. 5 llb. 920° w

0.0!:> .02 .06

**

** **

**

** Note: Nine each additional records** recovered at downstream,

slope, left and right abutments, and left and right crests.

See footnotes at end of table.

21

Table l. - Summary of accelerograms recovered during May -August 1980 - continued

Event

25 May 19<l0-5 June 1980 -continued-

Station name Station S-t 2 Direction 3 lVI ax ace-~ 4 Duration 5

(owner) 1 coo rd. ( s) (_g) ( s)

Buchanan Dam 37.217° N * (ACOE) 119.983° w

Right abutment **

Lower tower **

Upper tower **

Crest **

Note: Three each additional records** recovered at right abutment and lower tower; two each additional records** recovered at upper tower and crest.

Terminus Dam 36.41° N * (ACOE) 119.00° w

Crest 277° 0. 1() 1-peak Up .ub

187° .07

Right abutment **

Tower **

Downstream 277° .06 Up .()2

187° .()4

Note: Four each additional records** recovered from crest, downstream, and right abutment; two additional records** recovered from tower.

Pine Flat Dam 36.83° N * (ACOE) 119.33° w

Tower - 2nd level **

Tower - 5th 1 evel 255° .11 1-peak Up .04

165° .07

Downstream **

Note~ Three each additional records** recovered from tower (both levels) and downstream stations.

See footnotes at end of table.

22

Table l. - Summary of acceZerograms recovered during May- August 1980- continued

Event

18 September 1979-6 June 1980 Central California Epicenters and magnitudes unknown

9 June 1980 0328 UTC No. Mexico 32.22N, 114.99W Magnitude 6. 1

See footnotes at end

Station name (owner)l

Pleasant Valley Pumping plant (USGS)

Switchyard

Basement

First floor

Roof

Station coord.

S-t2 DirectionS Max acc14 Duration 5

( s) (g) ( s)

36.31 o N. * 120.25° w

**

**

**

**

Note: Three each additional records** recovered at switchyard, basement, first floor, and roof.

Bonds Corner 32.693° N 8.7 230° o. 12 1. 2 Highways 98 and 115 115.338° w Up .03 (USGS) 140° • 13 1.6

Calipatria 33.13° N * ** Fire Stat ion 115.52° w (USGS)

Calexico Fire Station 32.669° N 8.9 ** Fifth and Mary 115.492° w (USGS)

El Centro Array 2 32.916° N * ** Keystone Road 115.366° w {USGS)

El Centro Array 10 32.780° N 9.2 ** Community Hospital 115.567° w (USGS) t

E l Centro Array 11 32.752° N * ** McCabe School 115.594° w (USGS)

Holtville 32.812° N * ** Post 0\fice 115.377° w (USGS)

E1 Centro Array 9 32.794° N * ** 302 Commercial Ave. 115.549° w (USGS) t

of table.

23

Table l. -Summary of acceZerograms recovered during May- August- continued

Event

9 June 1980 0328 UTC -continued-

7 March 1980-23 June 1980 Central California Epicenter and magnitude unknown

19 August 1979-24 June 1980 Central California Epicenter and magnitude unknown

27 July 1980 1852 UTC Maysville, Kentucky 38. l7N, 83.91W Magnitude 5.2

24 August 1980 1241 UTC Central California 37. 5 7N, 121. 6 7W Magnitude 4. l

Station name (owner)l

Yuma, Arizona Strand Avenue (USBR/USGS)

Station coord.

S-t2 Direction3 Max accl4 Duration5 (s) (~) (s)

32.73° N * 114.70° w

**

Bear Valley: Sta. 9 36.622° N * ** Schroll Ranch 121.276° W (USGS)

Note: May be related to central California earthquake of Apr i l l 3 , l 980 .

Gilroy Array Sta. 2 36.982° N * 140° 0.08 Mission Trails Motel 121.556° w Up .()3 (CDMG) 050° .07

Gilroy Array Sta. 3 36.991° N * 140° .03 Sewage Plant 121.536° w Up .02 (CDMG) 050° .06

Note: May be related to central California earthquake of April 13, 1980.

Laurel River Dam Crest (ACOE)t

Nolin River Dam Center crest (ACOE)t

Livermore VA Hospital, (VA)t

Basement

Roof (7)

De l V a ll e 0 am (CDWR)t

Crest

Toe

Bldg. 62

36.961° N * 84.268° w

37.277° N * 86.247° w

37.625° N * 121.762° w

37.617° N 1.5 121.746° w

**

**

**

**

** **

See footnotes at end of table

24

Table 1. - Summary of accelerograms recovered during May- August 1980- continued

Event Station name (owner )1

Station coord.

S-t2 ( s)

Direction3 Max accl4

23 August 1979-9 Apri 1 198-i Central California Epicenters and magnitudes unknown

San Franc i sea Bank of America Bldg. (USGS)

Basement (3rd)

Concourse

22nd floor

52nd floor

37.79° N 122.40° w *

(_g)

** **

** **

Note: One each additional records** recovered at basement, concourse, 22nd, and 52nd floor. May be related to Livermore earthquakes of January 24 and 26, 1980.

1station owner code: ACOE CDMG CDWR USBR USGS VA

- U.S. Army Corps of Engineers. California Division of Mines and Geology. California Department of Water Resources. U.S. Bureau of Reclamation. U.S. Geological Survey. Veterans Administration. WWVB time code not legible or instrument not equipped with a correlation of accelerogram with event may be questionable.

2 S-wave arrival minus trigger time (S- t) interval. * S-t time is questionable or cannot be determined.

radio receiver;

Duration5

ls)

3Direction of case acceleration for upward trace deflection on accelerogram. Horizontal components are listed as azimuth in degrees clockwise from north. Vertical components are listed as "up" or "down."

4Peak acceleration recorded at ground level on one vertical and two horizontal orthogonal components unless otherwise noted. ** Denotes maximum acceleration is less than 0.05 ~at ground level or less than

0.10 ~at non ground-level stations.

5 Duration between first and last peaks of acceleration greater than U. lU ~·

25